1264403766 has 16 divisors (see below), whose sum is σ = 2566551744. Its totient is φ = 415177224.

The previous prime is 1264403761. The next prime is 1264403809. The reversal of 1264403766 is 6673044621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264403761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1572240 + ... + 1573043.

It is an arithmetic number, because the mean of its divisors is an integer number (160409484).

Almost surely, 2^1264403766 is an apocalyptic number.

1264403766 is an abundant number, since it is smaller than the sum of its proper divisors (1302147978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1264403766 is a wasteful number, since it uses less digits than its factorization.

1264403766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145355.

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 1264403766 is about 35558.4556188820. The cubic root of 1264403766 is about 1081.3391498725.

The spelling of 1264403766 in words is "one billion, two hundred sixty-four million, four hundred three thousand, seven hundred sixty-six".